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Bug#857624: marked as done (kernel warning/backtrace in parport/ppdev when running as a VM)

Your message dated Sat, 15 May 2021 05:09:27 -0700 (PDT)
with message-id <609fb9f7.1c69fb81.3f8de.ca99@mx.google.com>
and subject line Closing this bug (BTS maintenance for src:linux bugs)
has caused the Debian Bug report #857624,
regarding kernel warning/backtrace in parport/ppdev when running as a VM
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
857624: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=857624
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: src:linux
Version: 4.9.13-1
Severity: important

Booting a freshly installed stretch system under (jessie's) qemu-kvm
results in a couple of kernel warnings related to parport on every boot.
I've experienced this on a few different systems now, in different
infrastructures, so I'm guessing this may be easily reproducible.

The qemu-kvm arguments to boot the VM, FWIW, are:

/usr/bin/qemu-system-x86_64 -name hostname.example.org -m 1024 -smp 2 -pidfile /var/run/ganeti/kvm-hypervisor/pid/hostname.example.org -balloon virtio,id=balloon,bus=pci.0,addr=0x3 -daemonize -machine pc-i440fx-2.5,accel=kvm -monitor unix:/var/run/ganeti/kvm-hypervisor/ctrl/hostname.example.org.monitor,server,nowait -serial unix:/var/run/ganeti/kvm-hypervisor/ctrl/hostname.example.org.serial,server,nowait -usb -display none -uuid 74938386-ca2d-4af1-9878-3a07bd81f9df -netdev type=tap,id=hotnic-cc1c5606-pci-5,fd=10 -device virtio-net-pci,mac=aa:00:00:3b:60:cb,id=hotnic-cc1c5606-pci-5,bus=pci.0,addr=0x5,netdev=hotnic-cc1c5606-pci-5 -qmp unix:/var/run/ganeti/kvm-hypervisor/ctrl/hostname.example.org.qmp,server,nowait -qmp unix:/var/run/ganeti/kvm-hypervisor/ctrl/hostname.example.org.kvmd,server,nowait -boot c -device virtio-blk-pci,drive=hotdisk-7c7dc94d-pci-4,id=hotdisk-7c7dc94d-pci-4,bus=pci.0,addr=0x4 -drive file=/var/run/ganeti/instance-disks/hostname.example.org:0,format=raw,if=none,aio=native,id=hotdisk-7c7dc94d-pci-4,bus=0,unit=4 -S

And the backtraces are:

[    7.095889] ppdev: user-space parallel port driver
[    7.101588] ------------[ cut here ]------------
[    7.101605] WARNING: CPU: 1 PID: 227 at /build/linux-QtSjAP/linux-4.9.13/fs/sysfs/dir.c:31 sysfs_warn_dup+0x5d/0x70
[    7.101606] sysfs: cannot create duplicate filename '/devices/pnp0/00:04/ppdev/parport0'
[    7.101607] Modules linked in: ppdev joydev evdev bochs_drm serio_raw ttm drm_kms_helper virtio_balloon sg pcspkr drm parport_pc(+) parport acpi_cpufreq tpm_tis tpm_tis_core tpm button ip_tables x_tables autofs4 ext4 crc16 jbd2 crc32c_generic fscrypto ecb glue_helper lrw gf128mul ablk_helper cryptd aes_x86_64 mbcache sr_mod cdrom ata_generic virtio_net virtio_blk ata_piix libata psmouse uhci_hcd floppy ehci_hcd scsi_mod i2c_piix4 usbcore virtio_pci virtio_ring virtio usb_common
[    7.101640] CPU: 1 PID: 227 Comm: systemd-udevd Not tainted 4.9.0-2-amd64 #1 Debian 4.9.13-1
[    7.101641] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[    7.101643]  0000000000000000 ffffffff92728594 fffface8c0483808 0000000000000000
[    7.101645]  ffffffff92476dde ffff8fb379ea5000 fffface8c0483860 ffff8fb379f393c0
[    7.101647]  ffff8fb37db6c300 ffff8fb37d943400 0000000006300000 ffffffff92476e5f
[    7.101649] Call Trace:
[    7.101662]  [<ffffffff92728594>] ? dump_stack+0x5c/0x78
[    7.101668]  [<ffffffff92476dde>] ? __warn+0xbe/0xe0
[    7.101670]  [<ffffffff92476e5f>] ? warn_slowpath_fmt+0x5f/0x80
[    7.101672]  [<ffffffff9267fcea>] ? kernfs_path_from_node+0x4a/0x60
[    7.101674]  [<ffffffff9268325d>] ? sysfs_warn_dup+0x5d/0x70
[    7.101676]  [<ffffffff92683330>] ? sysfs_create_dir_ns+0x70/0x80
[    7.101679]  [<ffffffff9272b23d>] ? kobject_add_internal+0x9d/0x320
[    7.101680]  [<ffffffff9272b535>] ? kobject_add+0x75/0xd0
[    7.101692]  [<ffffffff9286953e>] ? device_add+0x14e/0x620
[    7.101695]  [<ffffffff92869bf9>] ? device_create_groups_vargs+0xd9/0xf0
[    7.101700]  [<ffffffffc0302060>] ? dead_read+0x10/0x10 [parport]
[    7.101702]  [<ffffffff92869c81>] ? device_create+0x51/0x70
[    7.101711]  [<ffffffff929ed0eb>] ? klist_next+0x1b/0xf0
[    7.101714]  [<ffffffffc0302073>] ? driver_check+0x13/0x20 [parport]
[    7.101715]  [<ffffffff9286a7a2>] ? bus_for_each_drv+0x62/0xb0
[    7.101718]  [<ffffffffc030369c>] ? parport_announce_port+0xbc/0x100 [parport]
[    7.101722]  [<ffffffffc0315f0a>] ? parport_pc_probe_port+0x6ba/0xbb0 [parport_pc]
[    7.101724]  [<ffffffff92868e1c>] ? _dev_info+0x6c/0x90
[    7.101726]  [<ffffffffc031679e>] ? parport_pc_pnp_probe+0x13e/0x1e0 [parport_pc]
[    7.101729]  [<ffffffffc0316660>] ? parport_pc_pci_probe+0x260/0x260 [parport_pc]
[    7.101735]  [<ffffffff927f05bc>] ? pnp_device_probe+0x5c/0xc0
[    7.101737]  [<ffffffff9286cb4a>] ? driver_probe_device+0x21a/0x420
[    7.101739]  [<ffffffff9286ce2a>] ? __driver_attach+0xda/0xe0
[    7.101741]  [<ffffffff9286cd50>] ? driver_probe_device+0x420/0x420
[    7.101742]  [<ffffffff9286a6d7>] ? bus_for_each_dev+0x67/0xb0
[    7.101744]  [<ffffffff9286bd8a>] ? bus_add_driver+0x16a/0x260
[    7.101746]  [<ffffffff9286d6c7>] ? driver_register+0x57/0xc0
[    7.101749]  [<ffffffffc02c03a3>] ? parport_pc_init+0x2cd/0xf2a [parport_pc]
[    7.101757]  [<ffffffff92929abc>] ? netlink_broadcast_filtered+0x14c/0x3d0
[    7.101760]  [<ffffffffc02c00d6>] ? parport_parse_param.constprop.14+0xd6/0xd6 [parport_pc]
[    7.101762]  [<ffffffff9240218b>] ? do_one_initcall+0x4b/0x180
[    7.101766]  [<ffffffff925c3c8d>] ? __vunmap+0x6d/0xc0
[    7.101772]  [<ffffffff9257a35c>] ? do_init_module+0x5b/0x1ed
[    7.101776]  [<ffffffff924ff713>] ? load_module+0x2523/0x2a00
[    7.101777]  [<ffffffff924fbf50>] ? __symbol_put+0x60/0x60
[    7.101779]  [<ffffffff924ffe36>] ? SYSC_finit_module+0xc6/0xf0
[    7.101781]  [<ffffffff92403b1c>] ? do_syscall_64+0x7c/0xf0
[    7.101787]  [<ffffffff929faf6f>] ? entry_SYSCALL64_slow_path+0x25/0x25
[    7.101789] ---[ end trace 7d54979a5167cd9e ]---
[    7.101790] ------------[ cut here ]------------
[    7.101792] WARNING: CPU: 1 PID: 227 at /build/linux-QtSjAP/linux-4.9.13/lib/kobject.c:240 kobject_add_internal+0x2ab/0x320
[    7.101793] kobject_add_internal failed for parport0 with -EEXIST, don't try to register things with the same name in the same directory.
[    7.101794] Modules linked in: ppdev joydev evdev bochs_drm serio_raw ttm drm_kms_helper virtio_balloon sg pcspkr drm parport_pc(+) parport acpi_cpufreq tpm_tis tpm_tis_core tpm button ip_tables x_tables autofs4 ext4 crc16 jbd2 crc32c_generic fscrypto ecb glue_helper lrw gf128mul ablk_helper cryptd aes_x86_64 mbcache sr_mod cdrom ata_generic virtio_net virtio_blk ata_piix libata psmouse uhci_hcd floppy ehci_hcd scsi_mod i2c_piix4 usbcore virtio_pci virtio_ring virtio usb_common
[    7.101812] CPU: 1 PID: 227 Comm: systemd-udevd Tainted: G        W       4.9.0-2-amd64 #1 Debian 4.9.13-1
[    7.101812] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[    7.101813]  0000000000000000 ffffffff92728594 fffface8c0483848 0000000000000000
[    7.101815]  ffffffff92476dde ffff8fb37db21c10 fffface8c04838a0 ffff8fb37db6c300
[    7.101817]  00000000ffffffef ffff8fb37d943400 0000000006300000 ffffffff92476e5f
[    7.101819] Call Trace:
[    7.101820]  [<ffffffff92728594>] ? dump_stack+0x5c/0x78
[    7.101822]  [<ffffffff92476dde>] ? __warn+0xbe/0xe0
[    7.101824]  [<ffffffff92476e5f>] ? warn_slowpath_fmt+0x5f/0x80
[    7.101826]  [<ffffffff9272b44b>] ? kobject_add_internal+0x2ab/0x320
[    7.101828]  [<ffffffff9272b535>] ? kobject_add+0x75/0xd0
[    7.101829]  [<ffffffff9286953e>] ? device_add+0x14e/0x620
[    7.101831]  [<ffffffff92869bf9>] ? device_create_groups_vargs+0xd9/0xf0
[    7.101833]  [<ffffffffc0302060>] ? dead_read+0x10/0x10 [parport]
[    7.101835]  [<ffffffff92869c81>] ? device_create+0x51/0x70
[    7.101838]  [<ffffffff929ed0eb>] ? klist_next+0x1b/0xf0
[    7.101842]  [<ffffffffc0302073>] ? driver_check+0x13/0x20 [parport]
[    7.101844]  [<ffffffff9286a7a2>] ? bus_for_each_drv+0x62/0xb0
[    7.101846]  [<ffffffffc030369c>] ? parport_announce_port+0xbc/0x100 [parport]
[    7.101849]  [<ffffffffc0315f0a>] ? parport_pc_probe_port+0x6ba/0xbb0 [parport_pc]
[    7.101850]  [<ffffffff92868e1c>] ? _dev_info+0x6c/0x90
[    7.101853]  [<ffffffffc031679e>] ? parport_pc_pnp_probe+0x13e/0x1e0 [parport_pc]
[    7.101855]  [<ffffffffc0316660>] ? parport_pc_pci_probe+0x260/0x260 [parport_pc]
[    7.101857]  [<ffffffff927f05bc>] ? pnp_device_probe+0x5c/0xc0
[    7.101859]  [<ffffffff9286cb4a>] ? driver_probe_device+0x21a/0x420
[    7.101860]  [<ffffffff9286ce2a>] ? __driver_attach+0xda/0xe0
[    7.101862]  [<ffffffff9286cd50>] ? driver_probe_device+0x420/0x420
[    7.101863]  [<ffffffff9286a6d7>] ? bus_for_each_dev+0x67/0xb0
[    7.101865]  [<ffffffff9286bd8a>] ? bus_add_driver+0x16a/0x260
[    7.101867]  [<ffffffff9286d6c7>] ? driver_register+0x57/0xc0
[    7.101869]  [<ffffffffc02c03a3>] ? parport_pc_init+0x2cd/0xf2a [parport_pc]
[    7.101871]  [<ffffffff92929abc>] ? netlink_broadcast_filtered+0x14c/0x3d0
[    7.101873]  [<ffffffffc02c00d6>] ? parport_parse_param.constprop.14+0xd6/0xd6 [parport_pc]
[    7.101874]  [<ffffffff9240218b>] ? do_one_initcall+0x4b/0x180
[    7.101876]  [<ffffffff925c3c8d>] ? __vunmap+0x6d/0xc0
[    7.101878]  [<ffffffff9257a35c>] ? do_init_module+0x5b/0x1ed
[    7.101879]  [<ffffffff924ff713>] ? load_module+0x2523/0x2a00
[    7.101881]  [<ffffffff924fbf50>] ? __symbol_put+0x60/0x60
[    7.101882]  [<ffffffff924ffe36>] ? SYSC_finit_module+0xc6/0xf0
[    7.101884]  [<ffffffff92403b1c>] ? do_syscall_64+0x7c/0xf0
[    7.101886]  [<ffffffff929faf6f>] ? entry_SYSCALL64_slow_path+0x25/0x25
[    7.101887] ---[ end trace 7d54979a5167cd9f ]---
[    7.123639] Adding 998396k swap on /dev/vda5.  Priority:-1 extents:1 across:998396k FS

Thanks,
Faidon

--- End Message ---
--- Begin Message --- 
Hi

This bug was filed for a very old kernel or the bug is old itself
without resolution.

If you can reproduce it with

- the current version in unstable/testing
- the latest kernel from backports

please reopen the bug, see https://www.debian.org/Bugs/server-control
for details.

Regards,
Salvatore

--- End Message ---
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